package com.itheima.a01staticdemo1;

public class ArrayUtil {
    private ArrayUtil() {
    }

    public static String printArr(int[] arr){
        StringBuilder sb = new StringBuilder();
        sb.append("[");
        for (int i = 0; i < arr.length; i++) {
            if(i==arr.length-1){
                sb.append(arr[i]);
            }else{
                sb.append(arr[i]).append(", ");
            }
        }
        sb.append("]");
        return sb.toString();
    }

    public static double getAverage(double[] arr){
        double sum = 0;
        for (int i = 0; i < arr.length; i++) {
            sum = sum +arr[i];
        }
        return sum / arr.length;
    }
}


